Thermostat: Service and Repair

1. Drain cooling system until radiator coolant level is below thermostat.
2. Remove thermostat housing bolts and/or studs, then thermostat housing and thermostat.
3. Thoroughly clean gasket surfaces of thermostat housing and intake manifold.
4. Reverse procedure to install. Torque thermostat housing bolts and/or studs to 21 ft. lbs. on all except 7.5L/V8-454 engine, on 7.5L/V8-454 engines torque bolts to 27 ft. lbs.